Rhythm. Normal cardiac rhythm arises from the SA node (sinus rhythm) but pacemaker impulses can come from ectopic foci in the atria, the AV junction, and the ventricles under abnormal conditions. When an ectopic impulse occurs singly, it generates a beat; when the beat repeats itself, it becomes a rhythm.
The Ksp value is calculated from the concentrations of the products of Ca(OH)2 when the compound is added to an aqueous solution. Calculating the value requires knowing those concentrations, the... The Ksp value is calculated from the concentrations of the products of Ca(OH)2 when the compound is added to an aqueous solution.
Problem 1 involves calculating some equilibrium concentrations and then a value for Kc. The equation pV = nRT is used to calculate some corresponding (partial) pressures, from which a value for Kp can be calculated.his reaction involves a change in gaseous volume on reaching equilibrium (an increase in this case) and so the total pressure will change. 1  Use the equation PV = nRT to calculate the initial pressure of the SO 3 (g). 2  Use the equation pV = nRT to calculate the equilibrium partial pressure of the O 2 (g).